1 /*
   2  * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6277663
  27  * @summary Test TPE extensibility framework
  28  * @library /test/lib
  29  * @author Martin Buchholz
  30  */
  31 
  32 import static java.util.concurrent.TimeUnit.MILLISECONDS;
  33 
  34 import java.util.concurrent.ArrayBlockingQueue;
  35 import java.util.concurrent.Callable;
  36 import java.util.concurrent.FutureTask;
  37 import java.util.concurrent.RunnableFuture;
  38 import java.util.concurrent.RunnableScheduledFuture;
  39 import java.util.concurrent.ScheduledThreadPoolExecutor;
  40 import java.util.concurrent.ThreadPoolExecutor;
  41 import java.util.concurrent.TimeUnit;
  42 import java.util.concurrent.atomic.AtomicInteger;
  43 import java.util.function.BooleanSupplier;
  44 import jdk.test.lib.Utils;
  45 
  46 public class Custom {
  47     static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
  48     static volatile int passed = 0, failed = 0;
  49     static void pass() { passed++; }
  50     static void fail() { failed++; Thread.dumpStack(); }
  51     static void unexpected(Throwable t) { failed++; t.printStackTrace(); }
  52     static void check(boolean cond) { if (cond) pass(); else fail(); }
  53     static void equal(Object x, Object y) {
  54         if (x == null ? y == null : x.equals(y)) pass();
  55         else {System.out.println(x + " not equal to " + y); fail(); }}
  56 
  57     private static class CustomTask<V> extends FutureTask<V> {
  58         public static final AtomicInteger births = new AtomicInteger(0);
  59         CustomTask(Callable<V> c) { super(c); births.getAndIncrement(); }
  60         CustomTask(Runnable r, V v) { super(r, v); births.getAndIncrement(); }
  61     }
  62 
  63     private static class CustomTPE extends ThreadPoolExecutor {
  64         CustomTPE() {
  65             super(threadCount, threadCount,
  66                   30, TimeUnit.MILLISECONDS,
  67                   new ArrayBlockingQueue<Runnable>(2*threadCount));
  68         }
  69         protected <V> RunnableFuture<V> newTaskFor(Callable<V> c) {
  70             return new CustomTask<V>(c);
  71         }
  72         protected <V> RunnableFuture<V> newTaskFor(Runnable r, V v) {
  73             return new CustomTask<V>(r, v);
  74         }
  75     }
  76 
  77     private static class CustomSTPE extends ScheduledThreadPoolExecutor {
  78         public static final AtomicInteger decorations = new AtomicInteger(0);
  79         CustomSTPE() {
  80             super(threadCount);
  81         }
  82         protected <V> RunnableScheduledFuture<V> decorateTask(
  83             Runnable r, RunnableScheduledFuture<V> task) {
  84             decorations.getAndIncrement();
  85             return task;
  86         }
  87         protected <V> RunnableScheduledFuture<V> decorateTask(
  88             Callable<V> c, RunnableScheduledFuture<V> task) {
  89             decorations.getAndIncrement();
  90             return task;
  91         }
  92     }
  93 
  94     static int countExecutorThreads() {
  95         Thread[] threads = new Thread[Thread.activeCount()+100];
  96         Thread.enumerate(threads);
  97         int count = 0;
  98         for (Thread t : threads)
  99             if (t != null && t.getName().matches("pool-[0-9]+-thread-[0-9]+"))
 100                 count++;
 101         return count;
 102     }
 103 
 104     private static final int threadCount = 10;
 105 
 106     static long millisElapsedSince(long startTime) {
 107         return (System.nanoTime() - startTime) / (1000L * 1000L);
 108     }
 109 
 110     static void spinWaitUntil(BooleanSupplier predicate, long timeoutMillis) {
 111         long startTime = -1L;
 112         while (!predicate.getAsBoolean()) {
 113             if (startTime == -1L)
 114                 startTime = System.nanoTime();
 115             else if (millisElapsedSince(startTime) > timeoutMillis)
 116                 throw new AssertionError(
 117                     String.format("timed out after %s ms", timeoutMillis));
 118             Thread.yield();
 119         }
 120     }
 121 
 122     public static void main(String[] args) throws Throwable {
 123         CustomTPE tpe = new CustomTPE();
 124         equal(tpe.getCorePoolSize(), threadCount);
 125         equal(countExecutorThreads(), 0);
 126         for (int i = 0; i < threadCount; i++)
 127             tpe.submit(new Runnable() { public void run() {}});
 128         equal(countExecutorThreads(), threadCount);
 129         equal(CustomTask.births.get(), threadCount);
 130         tpe.shutdown();
 131         tpe.awaitTermination(LONG_DELAY_MS, MILLISECONDS);
 132         spinWaitUntil(() -> countExecutorThreads() == 0, LONG_DELAY_MS);
 133 
 134         CustomSTPE stpe = new CustomSTPE();
 135         for (int i = 0; i < threadCount; i++)
 136             stpe.submit(new Runnable() { public void run() {}});
 137         equal(CustomSTPE.decorations.get(), threadCount);
 138         equal(countExecutorThreads(), threadCount);
 139         stpe.shutdown();
 140         stpe.awaitTermination(LONG_DELAY_MS, MILLISECONDS);
 141         spinWaitUntil(() -> countExecutorThreads() == 0, LONG_DELAY_MS);
 142 
 143         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
 144         if (failed > 0) throw new Exception("Some tests failed");
 145     }
 146 }